Добавление SearchBar на TableView

Question

Я хочу добавить строку поиска в моем представлении таблицы, которая заполнена данными из Core Data. Ниже приведены части кода моего TableViewController. Как начать реализацию функции searchbar после размещения ее в таблице?

let managedObjectContext = 
(UIApplication.sharedApplication().delegate 
as! AppDelegate).managedObjectContext 

var fetchedLastName = [String]() 
var fetchedFirstName = [String]() 
var fetchedImage = [UIImage]() 

override func viewDidLoad() { 
super.viewDidLoad() 

NSNotificationCenter.defaultCenter().addObserver(self, selector: "reloadData:",name:"load", object: nil) 

let entityDescription = 
NSEntityDescription.entityForName("Faculty", 
    inManagedObjectContext: managedObjectContext) 

let request = NSFetchRequest() 
request.entity = entityDescription 

do{ 
    let objects = try managedObjectContext.executeFetchRequest(request) 

    let results = objects 

    if results.count > 0 { 
     for var i = 0; i < results.count; i += 1{ 
      let match = results[i] as! NSManagedObject 

      fetchedLastName.append((match.valueForKey("lastname") as? String)!) 
      fetchedFirstName.append((match.valueForKey("firstname") as? String)!) 
      let image = match.valueForKey("image") as! NSData 
      fetchedImage.append(UIImage(data: image)!) 

     } 
    } else { 

    } 
} 
catch{} 

} 

func reloadData(notification: NSNotification){ 
fetchedLastName.removeAll() 
fetchedFirstName.removeAll() 
fetchedImage.removeAll() 

let entityDescription = 
NSEntityDescription.entityForName("Faculty", 
    inManagedObjectContext: managedObjectContext) 

let request = NSFetchRequest() 
request.entity = entityDescription 

do{ 
    let objects = try managedObjectContext.executeFetchRequest(request) 

    let results = objects 

    if results.count > 0 { 
     for var i = 0; i < results.count; i += 1{ 
      let match = results[i] as! NSManagedObject 

      fetchedLastName.append((match.valueForKey("lastname") as? String)!) 
      fetchedFirstName.append((match.valueForKey("firstname") as? String)!) 
      let image = match.valueForKey("image") as! NSData 
      fetchedImage.append(UIImage(data: image)!) 

     } 
    } else { 

    } 
} 
catch{} 

self.tableView.reloadData() 
} 

override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell { 
let cell = tableView.dequeueReusableCellWithIdentifier("TEACH", forIndexPath: indexPath) as! TEACHTableViewCell 

let row = indexPath.row 

print(fetchedFirstName) 

cell.facultyName.text = fetchedLastName[row] + ", " + fetchedFirstName[row] 
cell.facultyImage.image = fetchedImage[row] 

return cell 
} 

} 

Answer 1

Попробуйте этот код все проверено:

// 
// TEACHTableViewController.swift 
// TEACH 
// 
// Created by ICST340.N1 on 9/29/15. 
// Copyright © 2015 IyoTugs. All rights reserved. 
// 

import UIKit 
import CoreData 

class TEACHTableViewController: UITableViewController, UISearchBarDelegate,  UISearchControllerDelegate, UISearchResultsUpdating { 

var searchController = UISearchController() 

var filteredTableData = [[String: AnyObject?]]() 
var tableData = [[String: AnyObject?]]() 

let managedObjectContext = 
(UIApplication.sharedApplication().delegate 
    as! AppDelegate).managedObjectContext 

var fetchedLastName = [String]() 
var fetchedFirstName = [String]() 
var fetchedImage = [UIImage]() 

override func viewDidLoad() { 
    super.viewDidLoad() 

    //setup search controller 

    searchController = UISearchController(searchResultsController: nil) 
    searchController.searchResultsUpdater = self 
    searchController.dimsBackgroundDuringPresentation = false 
    searchController.delegate = self 

    tableView.tableHeaderView = searchController.searchBar 
    definesPresentationContext = true 
    searchController.searchBar.sizeToFit() 

    NSNotificationCenter.defaultCenter().addObserver(self, selector: "reloadData:",name:"load", object: nil) 

    let entityDescription = 
    NSEntityDescription.entityForName("Faculty", 
     inManagedObjectContext: managedObjectContext) 

    let request = NSFetchRequest() 
    request.entity = entityDescription 

    do{ 
     let objects = try managedObjectContext.executeFetchRequest(request) 

     let results = objects 

     if results.count > 0 { 
      for var i = 0; i < results.count; i += 1{ 
       let match = results[i] as! NSManagedObject 

       fetchedLastName.append((match.valueForKey("lastname") as? String)!) 
       fetchedFirstName.append((match.valueForKey("firstname") as? String)!) 
       //added this is convert the image 
       let image = match.valueForKey("image") as! NSData 
       let realImage = UIImage(data: image)! 
       fetchedImage.append(UIImage(data: image)!) 
       tableData.append(["firstName" : match.valueForKey("firstname"), "lastName" : match.valueForKey("firstname"), "image" : realImage]) 

      } 
     } else { 

     } 
    } 
    catch{} 
    // Uncomment the following line to preserve selection between presentations 
    // self.clearsSelectionOnViewWillAppear = false 

    // Uncomment the following line to display an Edit button in the navigation bar for this view controller. 
    //  self.navigationItem.rightBarButtonItem = self.editButtonItem() 
} 

func reloadData(notification: NSNotification){ 
    fetchedLastName.removeAll() 
    fetchedFirstName.removeAll() 
    //Added this to remove all images 
    fetchedImage.removeAll() 
    tableData.removeAll() 

    let entityDescription = 
    NSEntityDescription.entityForName("Faculty", 
     inManagedObjectContext: managedObjectContext) 

    let request = NSFetchRequest() 
    request.entity = entityDescription 

    do{ 
     let objects = try managedObjectContext.executeFetchRequest(request) 

     let results = objects 

     if results.count > 0 { 
      for var i = 0; i < results.count; i += 1{ 
       let match = results[i] as! NSManagedObject 

       fetchedLastName.append((match.valueForKey("lastname") as? String)!) 
       fetchedFirstName.append((match.valueForKey("firstname") as? String)!) 
       //added this is convert the image 
       let image = match.valueForKey("image") as! NSData 
       let realImage = UIImage(data: image)! 
       fetchedImage.append(UIImage(data: image)!) 
       tableData.append(["firstName" : match.valueForKey("firstname"), "lastName" : match.valueForKey("firstname"), "image" : realImage]) 

      } 
     } else { 

     } 
    } 
    catch{} 

    self.tableView.reloadData() 
} 


override func didReceiveMemoryWarning() { 
    super.didReceiveMemoryWarning() 
    // Dispose of any resources that can be recreated. 
} 

// MARK: - Table view data source 

override func numberOfSectionsInTableView(tableView: UITableView) -> Int { 
    // #warning Incomplete implementation, return the number of sections 
    return 1 
} 

override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int { 
    // #warning Incomplete implementation, return the number of rows 
    if searchController.active { 
     return filteredTableData.count 
    } else { 
    return fetchedLastName.count 
    } 
} 


override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell { 
    let cell = tableView.dequeueReusableCellWithIdentifier("TEACH", forIndexPath: indexPath) as! TEACHTableViewCell 
    if searchController.active { 
     let row = indexPath.row 

     print(fetchedFirstName) 

     let firstName = filteredTableData[row]["firstName"] as! String 
     let lastName = filteredTableData[row]["lastName"] as! String 
     let image = filteredTableData[row]["image"] as! UIImage 

     cell.facultyName.text = lastName + ", " + firstName 
     cell.facultyImage.image = image 
    } else { 

    let row = indexPath.row 

    print(fetchedFirstName) 

    cell.facultyName.text = fetchedLastName[row] + ", " + fetchedFirstName[row] 
    cell.facultyImage.image = fetchedImage[row] 
    } 
    return cell 
} 

func filterContentForSearchText(searchText: String) { 
    for singleTableData in tableData { 
     let firstname = singleTableData["firstName"] as! String 
     let lastname = singleTableData["lastName"] as! String 
     let image = singleTableData["image"] as! UIImage 
     print(firstname) 
     print(lastname) 
     if searchText != "" { 
     if (firstname.rangeOfString(searchText) != nil) { 
      filteredTableData.append(["firstName" : firstname, "lastName" : lastname, "image" : image]) 
     } else if (lastname.rangeOfString(searchText) != nil) { 
      filteredTableData.append(["firstName" : firstname, "lastName" : lastname, "image" : image]) 
     } 
     } else { 
      filteredTableData.append(["firstName" : firstname, "lastName" : lastname, "image" : image]) 
     } 
    } 
} 

func updateSearchResultsForSearchController(searchController: UISearchController) { 
    filteredTableData.removeAll() 
    filterContentForSearchText(searchController.searchBar.text!) 
    tableView.reloadData() 
} 

}